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Not really all that well. The reason for the measurement is that the engine was damaged by the previous owner by detonation, preignition and the like. It broke ring lands, broke the top rings on all cylinders, and actually dented the liner on number 3. Number 2 piston was recently changed. I thought a valve had come apart in the past, but my machine shop seemed to think it was preignition. So with the history of the engine known, it caused great concern when the replacement pistons had a considerable dome. I needed to know if my new setup was going to require 93 octane or would be able to live on 87. The last thing I want to do is purchase a second $869 dollar kit... Here's what I have. 3 37/64 bore, 4 3/4 in stroke, .050 in head gasket with a 3 3/4 in cylinder holes, 110 cc combustion chamber. I measured a 22cc dome at zero deck. It is a 4 cyl engine. I came up with a 9.0649:1 or rounded to 9.1:1. Original engine had flat tops at zero deck and approx 120cc combustion chamber. The engine should measure 176 cu inches, but tht's not what I get when I cipher it out. Whadya'll get? Thanks Aaron
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